<html>
<head>
<base href="https://bugs.llvm.org/">
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - debug_info missing parameters for naked functions"
href="https://bugs.llvm.org/show_bug.cgi?id=38824">38824</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>debug_info missing parameters for naked functions
</td>
</tr>
<tr>
<th>Product</th>
<td>libraries
</td>
</tr>
<tr>
<th>Version</th>
<td>trunk
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Linux
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>enhancement
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>DebugInfo
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>dimitry@google.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=20837" name="attach_20837" title="source file">attachment 20837</a> <a href="attachment.cgi?id=20837&action=edit" title="source file">[details]</a></span>
source file
Source file:
extern "C" void naked_function(int value, char* name);
extern "C" void regular_function(int value, char* name);
void __attribute__((naked, noinline)) naked_function(int value, char* name) {
}
void regular_function(int value, char* name) {
}
Command line:
clang++ -g --shared -fPIC -o libtest.so src.cc
Result:
$ readelf -wi libtest.so
Contents of the .debug_info section:
Compilation Unit @ offset 0x0:
Length: 0x81 (32-bit)
Version: 4
Abbrev Offset: 0x0
Pointer Size: 8
<0><b>: Abbrev Number: 1 (DW_TAG_compile_unit)
<c> DW_AT_producer : (indirect string, offset: 0x0): clang version
8.0.0 (<a href="https://git.llvm.org/git/clang.git/">https://git.llvm.org/git/clang.git/</a>
1bc73590ad1335313e8f262393547b8af67c9167) (<a href="https://git.llvm.org/git/llvm.git/">https://git.llvm.org/git/llvm.git/</a>
24a8df2c420ee959f27acae6bac2969cdd0a5388)
<10> DW_AT_language : 4 (C++)
<12> DW_AT_name : (indirect string, offset: 0xb1): src.cc
<16> DW_AT_stmt_list : 0x0
<1a> DW_AT_comp_dir : (indirect string, offset: 0xb8):
/ssd/llvm/test/naked_debug_info
<1e> DW_AT_low_pc : 0x610
<26> DW_AT_high_pc : 0x1d
<1><2a>: Abbrev Number: 2 (DW_TAG_subprogram)
<2b> DW_AT_low_pc : 0x610
<33> DW_AT_high_pc : 0x7
<37> DW_AT_frame_base : 1 byte block: 56 (DW_OP_reg6 (rbp))
<39> DW_AT_name : (indirect string, offset: 0xd8): naked_function
<3d> DW_AT_decl_file : 1
<3e> DW_AT_decl_line : 4
<3f> DW_AT_external : 1
<1><3f>: Abbrev Number: 3 (DW_TAG_subprogram)
<40> DW_AT_low_pc : 0x620
<48> DW_AT_high_pc : 0xd
<4c> DW_AT_frame_base : 1 byte block: 56 (DW_OP_reg6 (rbp))
<4e> DW_AT_name : (indirect string, offset: 0xe7):
regular_function
<52> DW_AT_decl_file : 1
<53> DW_AT_decl_line : 7
<54> DW_AT_external : 1
<2><54>: Abbrev Number: 4 (DW_TAG_formal_parameter)
<55> DW_AT_location : 2 byte block: 91 7c (DW_OP_fbreg: -4)
<58> DW_AT_name : (indirect string, offset: 0xf8): value
<5c> DW_AT_decl_file : 1
<5d> DW_AT_decl_line : 7
<5e> DW_AT_type : <0x71>
<2><62>: Abbrev Number: 4 (DW_TAG_formal_parameter)
<63> DW_AT_location : 2 byte block: 91 70 (DW_OP_fbreg: -16)
<66> DW_AT_name : (indirect string, offset: 0x102): name
<6a> DW_AT_decl_file : 1
<6b> DW_AT_decl_line : 7
<6c> DW_AT_type : <0x78>
<2><70>: Abbrev Number: 0
<1><71>: Abbrev Number: 5 (DW_TAG_base_type)
<72> DW_AT_name : (indirect string, offset: 0xfe): int
<76> DW_AT_encoding : 5 (signed)
<77> DW_AT_byte_size : 4
<1><78>: Abbrev Number: 6 (DW_TAG_pointer_type)
<79> DW_AT_type : <0x7d>
<1><7d>: Abbrev Number: 5 (DW_TAG_base_type)
<7e> DW_AT_name : (indirect string, offset: 0x107): char
<82> DW_AT_encoding : 6 (signed char)
<83> DW_AT_byte_size : 1
<1><84>: Abbrev Number: 0
Note that while parameters for not naked function are preserved naked function
parameters are lost.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are on the CC list for the bug.</li>
</ul>
</body>
</html>